The Density Functional via Effective Action

2009/09/21 by Yi‐Kuo Yu, Yu, Yi-Kuo
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Physical and Chemical Molecular Interactions #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Rare-earth and actinide compounds

paper · pdf · doi:10.48550/arxiv.0909.3673

openalex publication_date 2009/09/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A rigorous derivation of the density functional via the effective action in the Hohenberg-Kohn theory is outlined. Using the auxiliary field method, in which the electric coupling constant e² need not be small, we show that the loop expansion of the exchange-correlation functional can be reorganized so as to be expressed entirely in terms of the Kohn-Sham single-particle orbitals and energies.

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